The morphology and reactivity of model catalysts based on cobalt oxide

1.

The Morphology and Reactivity of Model
Catalysts Based on Cobalt Oxide
Mgr. Oleksandr Korbut
Supervisor: Dr. Josef Mysliveček
Prague 2016

2. Contents

Motivation
Experimental methods to be applied
Categories and types of catalysts
Experimental project

3. Motivation

http://butane.chem.uiuc.edu/pshapley/Enlist/Labs/FuelCellLab/FuelCell.html

4. Experimental methods to be applied

STM
LEED
XPS
analyser
XPS/TDS/Preparation chamber

5. Categories and types of catalysts

• Homogeneous vs heterogeneous
• Types of catalysts:
- Ceria-based catalysts;
- Pt-based catalysts;
- Co-based catalysts.

6. Ceria based catalysts

V. Matolín, I. Matolínová, F. Dvořák, V. Johánek, J. Mysliveček; et al. CATALYSIS
TODAY, Volume 181, Issue 1, 12 February 2012, Pages 124-132

7. Pt-based catalysts

Image width: 60 nm. Tunneling parameters: (a) Us = 2.6 V, I = 0.4 nA and (b) Us = 2.5 V, I = 0.3 nA.
M. Happel, J. Mysliveček, V. Johánek; et al. JOURNAL OF
CATALYSIS, Volume 289, May 2012, Pages 118-126

8. Co-based catalysts

M. Li and E. I. Altman. J. PHYS. CHEM. C, Volume 118 (24), May 2014, Pages 12706–12716

9. Our experimental project

• To establish experimental procedures for obtaining thin
films of cobalt oxides CoO and Co3O4 with welldefined crystallographic orientation and a complete
coverage on a suitable metal or oxide substrate.
• To obtain experimental control of the morphology,
particularly the density of monoatomic steps, and of
density of oxygen vacancies on the oriented
continuous thin films of cobalt oxide.
• The measurement of reactivity towards H2O, O2 and
methanol (CH3OH) on previously developed and
quantitatively controlled model catalyst systems.

10. Thanks for your attention!